Introducción a QML

Sebastian Kügler <[email protected]>, FrOSCon 2006

Albert Astals Cid <[email protected]>

Qt Quick

An Introduction to Qt QuickAlbert Astals Cid



Qt Quick

Who is Albert Astals Cid?

It's me!

Computer Engineer by UPC

Using Qt since 2002

KDE developer since 2003

A TOTAL Qt Quick newbie



Qt Quick

A bit of history Qt development starts in 1990

Qt prototype in 1993

Qt 1.0 is released in 1996

KDE 1.0 is releaed in 1998

Qt adds support for Mac in 2001

Apple introduces the iPhone in 2007

Nokia adquires Trolltech in 2008

December 2009 Qt 4.6 is releaed with Symbian support



Qt Quick

What is Qt Quick?

Qt Quick is a collection of technologies that are designed to help developers create the kind of intuitive, modern-looking, fluid user interfaces that are increasingly used on mobile phones, media players, set-top boxes and other portable devices.

Who let Marketing write that?

Qt Quick is the marketing name for QML and some tools around it

QML is a declarative language designed to describe the user interface of a program: both what it looks like, and how it behaves.



Qt Quick

Declarative? What's that? You say what you want and not what to do

Example 1 – declarative

Example 2 – imperative

More or less the same

Example 3 still would be “Ok” with imperative programming

Example 4 Binding properties

Example 5 Would be a huge pain to do in regular imperative programming



Qt Quick

Bigger Examples Flickr

SameGame

PhotoViewer



Qt Quick

Benefits Clear separation between interface and business logic

Designer friendly CSS/Javascript-like

●Shiny

Problems No common style between applications (Qt Components might fix this 4.x?.8?.9?

Different way of thinking

New/Untested/buggy

Reduced use case



Qt Quick

Questions?

Introducción a QML

Documents

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